java学生选课源码

package com.mm.day08; import java.util.*; public class SchoolClass{ String name; Set set; Map map=new HashMap(); int end=1; public SchoolClass(String name){ this.name=name; set=new HashSet(); } public void addStudent(Student stu){ set.add(stu); for(Object obj:set){ System.out.println(obj); } } public void removeStudent(String name){ Student stu=new Student(name); if(set.contains(stu)){ set.remove(stu); } } public void result(){ for(Object obj1:set){ Student s=(Student)obj1; Set temp=new HashSet(); temp=s.getName(); for(Object obj2:temp){ System.out.println(obj2); if(map.containsKey(obj2)){ Integer i=(Integer)map.get(obj2); map.put(obj2,i+1); }else{ map.put(obj2,1); } } } Set s=map.keySet(); Iterator it=s.iterator(); while(it.hasNext()){ Object obj=it.next(); System.out.println(obj+":"+map.get(obj)); } } public static void main(String[] args){ Course cou1=new Course("语文"); Course cou2=new Course("数学"); Course cou3=new Course("外语"); Student stu1=new Student("张三丰"); Student stu2=new Student("李四光"); Student stu3=new Student("伍六一"); SchoolClass sc=new SchoolClass("first"); stu1.addCourse(cou1); stu1.addCourse(cou2); stu1.addCourse(cou3); stu2.addCourse(cou3); stu2.addCourse(cou2); stu3.addCourse(cou2); stu3.addCourse(cou3); sc.addStudent(stu1); sc.addStudent(stu2); sc.addStudent(stu3); stu1.getName(); System.out.println("*************************"); Set set3=stu1.getName(); for(Object obj:set3){ System.out.println(obj); } System.out.println("**************************"); sc.result(); } }